Controller for electromagnetic exciter using power line subharmo

Details Controller for electromagnetic exciter using power line subharmo Controller for electromagnetic exciter using power line subharmo

1983-11-16

1985-05-14

Duggan, Donovan F.

Electricity: motive power systems

Reciprocating or oscillating motor

Energizing winding circuit control

318132, H02K 3300

Patent

active

045175004

ABSTRACT:
A synchronized subharmonic controller for a dual coil electromagnetic vibrator, which derives both power and timing from a single phase AC line, having a trigger circuit which operates the coils at one-third the power line frequency. A timing circuit is optically coupled to alternately fire a pair of oppositely-directed SCR's with each SCR connecting one of the coils across the AC line. The optical coupling reduces feedback from the coil circuitry to the timing circuit. A pair of capacitors supply additional power to operate the coils and to reduce the peak values of current supplied by the power line.

REFERENCES:
patent: 3122690 (1964-02-01), Dion et al.
patent: 3129366 (1964-04-01), Fry
patent: 3129367 (1964-04-01), Der
patent: 3400316 (1968-09-01), Kuschel
patent: 4215297 (1980-07-01), Jacquemet
patent: 4303869 (1981-12-01), Baran
patent: 4401925 (1983-08-01), Brander

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